1928201838291 has 12 divisors (see below), whose sum is σ = 2812221021168. Its totient is φ = 1272987620784.

The previous prime is 1928201838257. The next prime is 1928201838307. The reversal of 1928201838291 is 1928381028291.

1928201838291 is a `hidden beast` number, since 1 + 92 + 82 + 0 + 18 + 382 + 91 = 666.

It is not a de Polignac number, because 1928201838291 - 2¹³ = 1928201830099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1928201838091) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1040021640 + ... + 1040023493.

It is an arithmetic number, because the mean of its divisors is an integer number (234351751764).

Almost surely, 2^{1928201838291} is an apocalyptic number.

1928201838291 is a deficient number, since it is larger than the sum of its proper divisors (884019182877).

1928201838291 is a wasteful number, since it uses less digits than its factorization.

1928201838291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2080045242 (or 2080045239 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 54.

The spelling of 1928201838291 in words is "one trillion, nine hundred twenty-eight billion, two hundred one million, eight hundred thirty-eight thousand, two hundred ninety-one".